Twitter API only posting to developer linked account?

Question

I have been trying to play around with Twitter API and using the npm i twitter-lite library. I want for others to post something through my website when they click on post and sign in, however, it only posts to my developer account. The following is my code:

const config = require('./config');
const twitter = require('twitter-lite');
const client = new twitter(config);



client
  .getRequestToken("website")
  .then(res =>
    console.log({
      reqTkn: res.oauth_token,
      reqTknSecret: res.oauth_token_secret
    })
  )
  .catch(console.error);


  client.post('statuses/update', { status: 'testing' }).then(result => {
    console.log('You successfully tweeted this : "' + result.text + '"');
  }).catch(console.error);

Appreciate any advice.